Change in Peripheral Oxygen Saturation by Using Different Breathing Procedures in High Altitude

This study has been completed.

Sponsor:

Collaborator:

MVZ für Laboratoriumsmedizin Koblenz

Information provided by (Responsible Party):

Andree Hillebrecht, University of Giessen

ClinicalTrials.gov Identifier:

NCT01468194

First received: October 9, 2011

Last updated: November 8, 2011

Last verified: November 2011

History of Changes

Purpose

In this investigation the researchers explore whether different types of breathing procedures can improve the peripheral oxygen saturation to reduce the risk of becoming a acute mountain sickness or a high altitude pulmonary edema.

Condition	Intervention
Acute Mountain Sickness	Other: Breathing procedure 1 Other: Breathing procedure 2


Study Type:	Interventional
Study Design:	Allocation: Non-Randomized Intervention Model: Single Group Assignment Masking: Single Blind (Outcomes Assessor) Primary Purpose: Prevention

Resource links provided by NLM:

MedlinePlus related topics: Oxygen Therapy

Genetic and Rare Diseases Information Center resources: Acute Mountain Sickness

U.S. FDA Resources

Further study details as provided by Andree Hillebrecht, University of Giessen:

Primary Outcome Measures:

change of peripheral oxygen saturation [ Time Frame: immediate after intervention ]
change of peripheral oxygen saturation under different breathing procedures in different altitudes

Secondary Outcome Measures:

change of breathing parameters [ Time Frame: immediate after intervention ]
change of breathing parameters under different breathing procedures in different altitudes
- breathing rate
- minute ventilation
- expiratory end-tidal CO2-partial pressure
change of cognition [ Time Frame: immediate after intervention ]
change of ability of cognition (measured by d2-test) under different breathing procedures in different altitudes


Estimated Enrollment:	30
Study Start Date:	July 2011
Study Completion Date:	November 2011
Primary Completion Date:	October 2011 (Final data collection date for primary outcome measure)

Arms	Assigned Interventions
Experimental: Breathing procedure 1 Walking with breathing procedure "1".	Other: Breathing procedure 1 inhalation during one step, exhalation during the next step
Experimental: Breathing procedure 2 Walking with breathing procedure "2".	Other: Breathing procedure 2 inhalation and exhalation during one step
No Intervention: Control group Walking without any reglementation of breathing

Detailed Description:

Acute mountain sickness (AMS) is a pathological effect of high altitude on humans caused by acute exposure to low partial pressure of oxygen at high altitude. It commonly occurs above 2500 meters of altitude. AMS appears as a collection of nonspecific symptoms acquired at high altitude or in low air pressure resembling a case of "flu, carbon monoxide poisoning, or a hangover".

It is caused by a drop in pressure and lowering partial pressure of oxygen during increasing altitude. The direct consequence of those changes is a hypoxic pulmonary vasoconstriction (Euler-Lijestrand-mechanism). In addition a rise in pulmonary blood pressure (Hypertonia) can occur so that there is a higher risk of developing a high altitude pulmonary edema (HAPE).

In this investigation the investigators are exploring whether different types of breathing procedures can improve the peripheral oxygen saturation. We are comparing breathing with no regulation with two different procedures of hyperventilation during trekking in different altitudes. Procedure 1 (hyperventilation 1) describes inhalation during one step and exhalation during the next step. Procedure 2 (hyperventilation 2) describes inhalation and exhalation during one step.

The effect of the different breathing procedures can be quantified measuring the peripheral oxygen saturation. In addition the investigators are comparing the breathing rate and the minute ventilation as well as the expiratory end-tidal CO2-partial pressure of the three different breathing procedures.

Furthermore, the investigators are examining the ability to concentrate in order to quantify the effect of AMS on organ functions.

Eligibility


Ages Eligible for Study:	18 Years and older (Adult, Senior)
Sexes Eligible for Study:	All
Accepts Healthy Volunteers:	Yes

Criteria

Exclusion Criteria:

acute clinically significant inter-current diseases

Contacts and Locations

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Please refer to this study by its ClinicalTrials.gov identifier: NCT01468194

Locations


Germany
University of Giessen
Giessen, Hessen, Germany, 35394

Sponsors and Collaborators

University of Giessen

MVZ für Laboratoriumsmedizin Koblenz

Investigators


Principal Investigator:	Gabor Szalay, Dr. med.	Trauma surgery - University hospital Giessen

More Information


Responsible Party:	Andree Hillebrecht, Akademischer Rat, University of Giessen
ClinicalTrials.gov Identifier:	NCT01468194 History of Changes
Other Study ID Numbers:	Gi-04-2011
Study First Received:	October 9, 2011
Last Updated:	November 8, 2011

Keywords provided by Andree Hillebrecht, University of Giessen:


AMS HAPE high altitude oxygen	saturation mountain climbing breathing

Additional relevant MeSH terms:


Altitude Sickness Respiration Disorders Respiratory Tract Diseases

ClinicalTrials.gov processed this record on July 28, 2017

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